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  <title>Returns the error number from previous operation</title>

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</div><hr /><div id="function.fbsql-errno" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">fbsql_errno</h1>
  <p class="verinfo">(PHP 4 &gt;= 4.0.6, PHP 5)</p><p class="refpurpose"><span class="refname">fbsql_errno</span> &mdash; <span class="dc-title">Returns the error number from previous operation</span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-function.fbsql-errno-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="type">int</span> <span class="methodname"><strong>fbsql_errno</strong></span>
    ([ <span class="methodparam"><span class="type">resource</span> <code class="parameter">$link_identifier</code></span>
  ] )</div>

  <p class="para rdfs-comment">
   Returns the numerical value of the error message from previous FrontBase
   operation.
  </p>
  <p class="para">
   Errors coming back from the fbsql database backend don&#039;t issue warnings.
   Instead, use <span class="function"><strong>fbsql_errno()</strong></span> to retrieve the error code.
   Note that this function only returns the error code from the most recently
   executed fbsql function (not including <span class="function"><a href="function.fbsql-error.html" class="function">fbsql_error()</a></span> 
   and <span class="function"><strong>fbsql_errno()</strong></span>), so if you want to use it, make sure
   you check the value before calling another fbsql function.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.fbsql-errno-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    <dt>
<em><code class="parameter">
link_identifier</code></em></dt>
<dd>
<p class="para">由
<span class="function"><a href="function.fbsql-connect.html" class="function">fbsql_connect()</a></span> 或
<span class="function"><a href="function.fbsql-pconnect.html" class="function">fbsql_pconnect()</a></span> 返回的 FrontBase 链接标识符.</p>
<p class="para">如可选并未指定，函数会尝试查找一个到 FrontBase 服务器的开放链接，且如没有找到这样的链接，会尝试通过不带参数调用 <span class="function"><a href="function.fbsql-connect.html" class="function">fbsql_connect()</a></span> 来创建一个。</p>
</dd>

   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.fbsql-errno-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns the error number from the last fbsql function, or
   <em>0</em> (zero) if no error occurred.
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.fbsql-errno-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-1095">
    <p><strong>Example #1 <span class="function"><strong>fbsql_errno()</strong></span> Example</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />fbsql_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"marliesle"</span><span style="color: #007700">);<br />echo&nbsp;</span><span style="color: #0000BB">fbsql_errno</span><span style="color: #007700">()&nbsp;.&nbsp;</span><span style="color: #DD0000">":&nbsp;"&nbsp;</span><span style="color: #007700">.&nbsp;</span><span style="color: #0000BB">fbsql_error</span><span style="color: #007700">()&nbsp;.&nbsp;</span><span style="color: #DD0000">"&lt;br&nbsp;/&gt;"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">fbsql_select_db</span><span style="color: #007700">(</span><span style="color: #DD0000">"nonexistentdb"</span><span style="color: #007700">);<br />echo&nbsp;</span><span style="color: #0000BB">fbsql_errno</span><span style="color: #007700">()&nbsp;.&nbsp;</span><span style="color: #DD0000">":&nbsp;"&nbsp;</span><span style="color: #007700">.&nbsp;</span><span style="color: #0000BB">fbsql_error</span><span style="color: #007700">()&nbsp;.&nbsp;</span><span style="color: #DD0000">"&lt;br&nbsp;/&gt;"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$conn&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">fbsql_query</span><span style="color: #007700">(</span><span style="color: #DD0000">"SELECT&nbsp;*&nbsp;FROM&nbsp;nonexistenttable;"</span><span style="color: #007700">);<br />echo&nbsp;</span><span style="color: #0000BB">fbsql_errno</span><span style="color: #007700">()&nbsp;.&nbsp;</span><span style="color: #DD0000">":&nbsp;"&nbsp;</span><span style="color: #007700">.&nbsp;</span><span style="color: #0000BB">fbsql_error</span><span style="color: #007700">()&nbsp;.&nbsp;</span><span style="color: #DD0000">"&lt;br&nbsp;/&gt;"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.fbsql-errno-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.fbsql-error.html" class="function" rel="rdfs-seeAlso">fbsql_error()</a> - Returns the error message from previous operation</span></li>
    <li class="member"><span class="function"><a href="function.fbsql-warnings.html" class="function" rel="rdfs-seeAlso">fbsql_warnings()</a> - Enable or disable FrontBase warnings</span></li>
   </ul>
  </p>
 </div>


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